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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Actomyosin is involved in the plasmolytic cycle: gliding movement of the deplasmolyzing protoplast
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Actomyosin is involved in the plasmolytic cycle: gliding movement of the deplasmolyzing protoplast

机译：肌动球蛋白参与纤溶酶循环：去纤溶原生质体的滑动运动

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The leaf cells of Chlorophytum comosum seem to have the ability to regulate their protoplast volume and shape during the plasmolytic cycle. This phenomenon was morphologically expressed by the stabilization of the plasmolyzed protoplast volume and shape within 1-5 min after the immersion of the leaf segments in the plasmolytic fluid and temporarily at the onset of deplasmolysis. During the latter stage the plasmolyzed protoplast rounded up and assumed a perfectly convex shape and glided into the cell lumen along the cell axis. This gliding movement was active, nonsaltatory, and conducted with a constant velocity and lasted for a short time. During this movement the protoplast volume did not change appreciably. As far as we know, this movement has not been described so far. Deplasmolysis proceeded and was rapidly completed when the protoplast stopped moving. Leaf cells which have been affected by an antiactin filament drug or myosin inhibitors lost their ability to regulate the volume and shape of the plasmolyzing protoplast. In addition, the gliding protoplast movement was also inhibited in the treated cells. These data show for the first time that the actomyosin system is involved in the mechanism of volume regulation during the plasmolytic cycle and that it underlies the gliding movement of the deplasmolyzing protoplast. [References: 48]
机译：绒毛绿藻的叶细胞似乎具有在溶浆过程中调节其原生质体体积和形状的能力。在叶片片段浸入溶浆液后的1-5分钟内，以及暂时在解浆开始时，溶浆的原生质体体积和形状的稳定化在形态上表达了这种现象。在后期阶段，经浆解的原生质体呈圆形，呈完美的凸形，并沿细胞轴滑入细胞内腔。这种滑行运动是活跃的，无盐的，并且以恒定的速度进行并持续了很短的时间。在该运动期间，原生质体的体积没有明显变化。据我们所知，到目前为止还没有描述这种运动。原生质体停止移动后，进行了去浆酶作用并迅速完成。受抗肌动蛋白丝药物或肌球蛋白抑制剂影响的叶细胞失去了调节溶质原生质体的体积和形状的能力。此外，在处理过的细胞中原生质体的滑动也受到抑制。这些数据首次表明，肌动球蛋白系统参与了溶酶周期中的体积调节机制，并且它是解质酶原生质体滑动运动的基础。 [参考：48]

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